Group 1 - The aviation maintenance industry in Hainan Free Trade Port is experiencing significant growth, with a total value of 336.5 billion yuan in aircraft, engines, and materials under customs supervision from January to July, representing an 81.7% year-on-year increase [1] - The Hainan Free Trade Port has implemented a "pre-examination materials, immediate approval, and fast customs clearance" mechanism, reducing the average tax review time by 90% and cutting the customs clearance time for re-imported materials by over 30%, which has lowered maintenance support costs by over 75% [1] - The customs authority has reported 46 aircraft under temporary inbound maintenance supervision, with a total value of 291.1 billion yuan, and has processed repair fee declarations amounting to 6.1 million yuan, resulting in a tax exemption of 950,400 yuan [2] Group 2 - The rapid growth in the aviation maintenance sector is attributed to the accelerated release of policy dividends from the Hainan Free Trade Port, including the introduction of the first national pilot regulatory scheme for temporary inbound repair of aircraft and vessels [2] - The integration of customs supervision into the entire process of bonded maintenance through the use of an intelligent ERP network and public information service platform has reduced operational costs for both customs and enterprises by over 30% [2]